Got my Herpstat 4 in the mail today when I got home. Now in the process of moving my under tank heaters onto it and getting them dialed in. My leopard gecko Rey was first and is now resting on her temperature controlled hot spot. I am only doing one at a time though so I can remove the animal until I am certain the temp is exactly where I want it before putting them back in. Next is my other leopard gecko, and ball python enclosure. The 4th control slot will be for the rack system that I paid for but am still waiting to have built/delivered.